Japan’s top tungsten company is now in the USA. The unique Reins tungsten down shot sinker design makes it easier to pull thru rocks, weeds, or brush with fewer hang ups. Reins tungsten down shot sinkers give you the ultimate performance with a specific gravity of 18. 2, each sinker is 40% smaller than its lead counterpart. Reins down shot sinkers are made up of 95% tungsten and 5% nickle alloy making them 1. 8 times as dense as lead and environmentally safe. The dense tungsten material allows you to feel every pebble along the bottom making it easier to tell a strike from a nibble.